import { GitlabGroup } from './gitlab.classes.group';
import * as plugins from './gitlab.plugins';

export class GitlabAccount {
  public static createAnonymousAccount() {
    return new GitlabAccount();
  }

  // INSTANCE
  public async getGroupByName(nameArg: string): Promise<GitlabGroup> {
    return GitlabGroup.getByName(nameArg, this);
  }

  /**
   * handles the basic request/response patterns with the gitlab.com API
   */
  public async request(
    methodArg: 'GET' | 'POST',
    routeArg: string,
    searchParamsArg: { [key: string]: string }
  ) {
    if (!routeArg.startsWith('/')) {
      throw new Error(`"${routeArg}" -> routeArg must start with a slash`);
    }
    const smarturlInstance = plugins.smarturl.Smarturl.createFromUrl(
      `https://gitlab.com/api/v4${routeArg}`,
      {
        searchParams: searchParamsArg,
      }
    );
    const response = await plugins.smartrequest.request(smarturlInstance.toString(), {
      method: methodArg,
    });

    // lets deal with pagination headers
    const findLinkName = (markup: string) => {
      const pattern = /<([^\s>]+)(\s|>)+/;
      return markup.match(pattern)[1];
    };
    if (typeof response.headers.link === 'string') {
      const links = response.headers.link.split(',');
      const linkObjects: {
        original: string;
        link: string;
      }[] = [];
      for (const link of links) {
        linkObjects.push({
          original: link,
          link: findLinkName(link),
        });
      }
      const next = linkObjects.find((linkObject) => linkObject.original.includes('rel="next"'));
      if (next && response.body instanceof Array) {
        const nextResponse = await this.request(
          methodArg,
          next.link.replace('https://gitlab.com/api/v4', ''),
          {}
        );
        response.body = response.body.concat(nextResponse);
      }
    }
    return response.body;
  }
}